How to copy/paste rigid-body-constraints in 2.73 rc1?
You can use Copy from Active. To do this, first select all your objects that will receive the Rigid Body physics, and then the one which already as it; This is so that the object which has the Rigid Body physics becomes the Active object.

Then, open the Toolbar (press T) and switch to the Physics tab; There, you can press Copy from Active to copy all the physics to the new objects.